Array.

　　We have to keep in mind that,the 'new' keyword create an array at the runtime rather that at the compile time,that is,at the compile time,jvm just check the syntax.

/*
Array demonstration.
Note that, the 'new' keyword does not create an array of 'a' until the runtime,that is,at the compile time,the jvm just check the syntax.
*/
import kju.print.Print;
class ArrayDemo 
{
    public static void main(String[] args) 
    {
        Print.println("---------------");
        int[] a = new int[5];
        Print.println("a[1] = " + a[1]);
        Print.println("a[5] = " + a[5]);    //ArrayIndexOutOfBoundsException: 5,but [compile well].
        Print.println("---------------");
        a = null;
        Print.println(a[2]);    //java.lang.NullPointerException,but [compile well].
    }
}